hey guys i just changed the egr valve and egr sensor because my truck was showing egr flow excessive and insufficient... now it's throwing the codes PO171 and PO174, both for system 1 and 2 lean banks... i got a TPS sensor and MAF sensor i will be putting on soon hoping those will fix the problem because it will run and idle perfect, then start missing and idling low, and sometimes will idle perfect and quit out of nowhere. this even happens while driving at low rpms. i am thinking TPS but could be wrong. let me know what you guys think and any ideas you may have.

well it has been a while since posting in this thread. just wanted to say the problem is still there. i have checked quite a few vacuum lines and fixed 2-3 that were bad but the problem was still there. i have new intake plenum gaskets to put on it probably this weekend. if that doesn't fix it, what other suggestions can you guys give?

well i'm hoping that when i change the intake plenum gasket this weekend that it'll fix it. but now i keep hearing a weird sound coming from somewhere on the passenger side that sounds like rubbing. it might just be the brakes because mine stick a little every now and then.

it's not coming from the engine area... more towards the sides around my wheels, that's why i mentioned that my brakes give me trouble like this every now and then. but it could be my ball joints or bearings, my ball joints have been bad for a while but haven't had the cash to fix them yet... maybe my bearings are going out too, it's always something with this truck haha but i love it to death... by the way, i've drove it short distances and had it up to 50-60mph a little lately and haven't heard the noise anymore so i do believe it was my brakes

got the intake plenum gaskets on and so far it has been running great with no more problems... it idled for 40-45 minutes without missing or dying and it drives TONS better without even thinking about dying. so i'm fairly sure it's fixed, it hasn't thrown anymore codes.

it's not coming from the engine area... more towards the sides around my wheels, that's why i mentioned that my brakes give me trouble like this every now and then. but it could be my ball joints or bearings, my ball joints have been bad for a while but haven't had the cash to fix them yet... maybe my bearings are going out too, it's always something with this truck haha but i love it to death... by the way, i've drove it short distances and had it up to 50-60mph a little lately and haven't heard the noise anymore so i do believe it was my brakes

Is it only at lower speeds, sounds like a quiet growl noise? I have a similar noise coming from my passenger side at lower speeds I'm guessing it has to do with brakes because driveline & front end is tight.

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Originally Posted by Caseywoods5

got the intake plenum gaskets on and so far it has been running great with no more problems... it idled for 40-45 minutes without missing or dying and it drives TONS better without even thinking about dying. so i'm fairly sure it's fixed, it hasn't thrown anymore codes.